/// <summary>
/// 从设备内部下载图片
/// </summary>
/// <param name="StartTime">DateTime类开始扫描时间</param>
/// <param name="EndTime">结束扫描时间</param>
unsafe public void SearchAndDown(DateTime StartTime, DateTime EndTime)
{
try
{
InitSDK();
if (m_InitSDK)
{
LoginSDK();
if (m_UserID == 0)
{
Findhandler = getFindHandler(StartTime, EndTime);
if (Findhandler < 0)
{
iLastErr = CHCNetSDK.NET_DVR_GetLastError();
Console.WriteLine("NET_DVR_FindPicture failed, error code = {0}", iLastErr);
return;
}
//用于存储图片信息
CHCNetSDK.NET_DVR_FIND_PICTURE_V50 struSavePictrue = new CHCNetSDK.NET_DVR_FIND_PICTURE_V50();
CHCNetSDK.NET_DVR_PIC_PARAM temp = new CHCNetSDK.NET_DVR_PIC_PARAM();
bool isFinding = true;
int picCounter = 0;
int downCounter = 0;
while (isFinding)
{
int lFindHandler2 = CHCNetSDK.NET_DVR_FindNextPicture_V50(Findhandler, ref struSavePictrue);
switch (lFindHandler2)
{
case CHCNetSDK.NET_DVR_FILE_SUCCESS:
if (struSavePictrue.sFileName.ToString().Contains("SNAP") && ((int)struSavePictrue.dwFileSize) > 0) //重要
{
picCounter++;
Console.WriteLine("Picture name ===> {0}", struSavePictrue.sFileName.ToString());
//初始化变量
temp.pDVRFileName = struSavePictrue.sFileName;
//申请内存
temp.pSavedFileBuf = Marshal.AllocHGlobal((int)struSavePictrue.dwFileSize);
temp.dwBufLen = struSavePictrue.dwFileSize;
temp.struAddr = struSavePictrue.struAddr;
//如果获取图片信息成功
if (CHCNetSDK.NET_DVR_GetPicture_V50(m_UserID, ref temp))
{
CHCNetSDK.NET_DVR_GetPicture(m_UserID, temp.pDVRFileName,
string.Format("{0}{1}{2}", m_savepath, temp.pDVRFileName, ".jpeg"));
downCounter++;
}
else
{
iLastErr = CHCNetSDK.NET_DVR_GetLastError();
Console.WriteLine("NET_DVR_GetPicture_V50 Pictrue name: [{0}] failed! erro code = {1}",
struSavePictrue.sFileName.ToString(), iLastErr);
}
//释放内存
Marshal.FreeHGlobal(temp.pSavedFileBuf);
}
break;
case CHCNetSDK.NET_DVR_ISFINDING:
break;
case CHCNetSDK.NET_DVR_FILE_NOFIND:
Console.WriteLine("\n未找到文件！");
isFinding = false;
break;
case CHCNetSDK.NET_DVR_FILE_EXCEPTION:
iLastErr = CHCNetSDK.NET_DVR_GetLastError();
Console.WriteLine("\n查找文件时异常：error code: {0}", iLastErr);
isFinding = false;
break;
case CHCNetSDK.NET_DVR_NOMOREFILE:
default:
Console.WriteLine("\n文件查找结束。共找到 {0} 张图片，下载 {1} 张图片... {2}",
picCounter, downCounter, DateTime.Now.ToString());
isFinding = false;
break;
}
}
}
}
}
catch (Exception)
{
throw;
}
finally
{
//停止查找
if (Findhandler > 0)
{
CHCNetSDK.NET_DVR_CloseFindPicture(Findhandler);
}
//注销用户
if (m_UserID > 0)
{
CHCNetSDK.NET_DVR_Logout(m_UserID);
}
//释放SDK资源
if (m_InitSDK)
{
CHCNetSDK.NET_DVR_Cleanup();
}
}
}